Ventilator.



J. C. TI'PPEIT. VENTILATOR. .APeucAnon wen 050.21. mm;

Patented Fen 4,1919.

I wm w IN VEN TOR.

WI TNESS A TTORNEYS' mum JOHN C. TIPPETT, OF SAN" FRANCISCO, CALIFORNIA.

VENTILATOR.

ventilating apparatus by which a draft of air may be produced through a single supply main, pipe, or passage, which may have connection at diiferent portions of its length, with sections or compartments requiring a circulation of air either for purifying or ventilating purposes, or forproducing a flow of air through any or all of said connections where such a movement of air is desirable. Such connections may be made with baths, toilets, drainage sewerage, buildings of all descriptions, railway carriages, mines, etc.

It consists of a main or passage, which may be vertically disposed and may have connections at different points in its length with those parts from which it is desired to withdraw the air or through which to circulate it. To the upper end of this tube which is open, is fixed a double frustum of a cone, the lower end of which fits the outside of the pipe and the upper end of which is flush with the open top of the pipe. From openings in the sides of the lower cone convergent, spirally disposed pipes or flues lead and connect with the inner tube at different elevations vertically, and these flues act in conjunction with a supplemental cone having a horizontal, closed bottom and standards by which it is supported above the double cone and the opening in the central pipe, so that air may flow freely across and a spiral flow of air is produced'through the vertical pipe and in conjunction with the horizontally flowing current. The supplemental cone has the same angle as the uppermost of the lower cones, and 1s of smaller diameter, so that a downward flow of air takes place over its surface and unites with the air flowing below this cone and is carried across with it between the cones.

Referring to the accompanying drawings for a more complete explanation of my invention Figure 1 is an exterior view of my device.

Fig. 2 is a vertical section.

Fig. 3 is a horizontal section on the line 3-3 of Fig. 1.

Specification of Letters Patent.

Application filed December27, 1917. Serial No. 209,062.

As illustrated, A is a substantially ver tical pipe or main having various openings which may communicate with parts from which it may be desirable to withdraw the accumulating air, gases, or vapors. The suction devices include three cones 4L, 5 and 6; the cones 4i and 5 being practically frustums, the open ends .of which are of such diameter that the lower end of the cone 4: fits closely against the outside of the pipe A and the top of cone 5 fits flush with the open top of the pi e A.

Above this dou le cone is fixed the cone 6, which is supported from the cone 5 by intermediate standards 7 which sustain the upper cone a short distance above the open top of the pipe A and the cone 5, so that any flow of atmospheric air may flow freely across this space in unison with the air clellvered from the pipe A. The lower surface of the cone 6 is closed by a horizontal plate 8 which prevents irregular movements of the air and eddies and insures a straight, smooth, horizontal flow. The cone 6 is of smaller peripheral diameter than the lower cones 4 and 5, and this causes a downward draft over the outer surface of the cone 6, which flow is turned below the periphery of the cone and joins with the horizontal flow between the cones.

In order to produce a spiral movement of the air passing up through the main A, and at the discharge passage above the tube, I insert a number of spirally disposed flues 9 within the lower cone 4. These pipes or fiues have their inlet openings made of larger diameter than their discharge, and these openings are made in the same horizontal plane through the cone. From their entrance the tubes are bent into a spiral form, and their inner ends open into the main A at successively higher points 10 and the draft of air through these spiral tubes is thus given a spiral or screw-like movement which greatly assist the upward movement of the air passing through the main A and produces a spiral movement of all this inflowing air, which finally unites with the horizontal flow between the cones and passes off with that current.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. In a ventilator, a vertical main, a pair bases secured together and having their apices secured about the main, and a series of fines arranged spirally around the main and disposed interiorly of the cones so as to be housed thereby, said fiues tapering from their lower to their upper ends and having their lower ends extending through the lower cone and arranged in substantially the same horizontal plane and having their upper ends extending through the main at points below and adjacent to the upper end thereof and in varying though closely adjacent horizontal planes, and a top cone sup-- ported in spaced relation above the upper cone and having a horizontal closed bottom, said top cone having the same pitch as that of the upper of the superimposed cones and having a diameter considerably less than that of the upper superimposed cone, whereby a downward flow of air occurring over its surface unites with the air flowing therebelow and flows across the space between the top and upper superimposed cones.

2. In a ventilator, a vertical main, a pair of superimposed frustum cones having their bases secured together and having their Copies of this patent may be obtained for five cents each, by addressing the apices secured about the main, and a series of fines arranged spirally around the main and disposed interiorly of the cones so as to be housed thereby, said fiues having their lower ends extending through the lower cone and having their upper ends extending through the main at points below and adjacent to the upper end thereof and in varying though closely adjacent horizontal planes, and a top cone of the same pitch as that of the upper superimposed cone but of less diameter than that of the latter whereby a downward flow of air occurring over its surface unites with the air flowing therebelow and flows across the space between the top and upper superimposed cones.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN C. TIPPETT.

Witnesses:

JOHN H. HERBING, W. W. HEALEY.

Commissioner of Patents,

Washington, D. G." 

